Pressure-gage and alarm



W. B. ANDERSON.

PRESSURE GAGE AND ALARM. APPLICATION FILED FEB 19, 1920.

, I 1 363 2 1 6 Patented Dec. 28, 1920.

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PRESSURE-GAGE AND ALARM.

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Specification of Letters Patent.

Patented Dec. 28, 1920.

Application filed February 19, 1920. Serial No. 359,813.

T 0 all whom it may concern.

Be it known that I, l' ILLIAM B. ANDER- SON, a citizen of the "United States, residing at Molson, in the county of Okanogan and State of Washington, have invented certain new and useful Improvements in Pressure- Gages and Alarms; and I do declare the following to be a full, clear, and exact de scription of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a combined pressure gage and alarm, and more specifically to an improved tire and pump connection combined with an improved air-pressure gage.

One object of this invention is to provide an improved fluid-pressure gage that has many uses and is exceedingly convenient and may be quickly and easily set for gaging any one of the predetermined pressures "for which it is designed.

Other objects and advantages will be pointed out or implied in the following details of description in connection with the accompanying drawings in which:

Figure 1 is a side elevation of my improved device.

Fig. 2 is an enlarged sectional view along the line 22 of Fig. 1.

Fig. 3 is a view partly in edge elevation and partly in vertical section, the section being taken substantially along the line 3-3 of Fig. 1.

Fig. 1 is a perspective view of a detached element of the device.

Referring to these drawings in detail, in which similar reference characters correspond with similar parts throughout the several views, the invention consists in the details of construction and arrangement hereinafter specifically described as follows:

A hollow body 1 is provided with a substantially cylindrical cavity 2 having a relatively small outlet opening at one end, this outlet opening extending through a tubular valve connection 3 provided with a nut 4; by means of which the device may be at tached to and in open communication with a tire-valve-stem (not shown). The other end of the cylindrical cavity or bore 2 is closed by a cap or cover 5 which may be secured by screw-threads not shown) or other appropriate means. The body 1 is provided with an air passage 6 which communicates with a tubular pump connection 7, and a cutoff valve 8 is provided for the tubular member 7 The air passage or fluid passage 6 communicates with the passage whlch extends through the connection 3, and therefore, it communicates with the interior of the cylindrical bore 2. A piston 9 is disposed within the bore 2, and a spring 10 constantly tends to press the piston toward the delivery outlet or passage through the tube 3.

The casing or body 1 is provided with a series of vents or fluid-escaping apertures 11 through which the interior of the cavity 2 can communicate with the outer air. The casing 1 is also provided with a Series of holes 12 which do not communicate with the interior of the cavity or bore 2. These holes 12 constitute keepers for receiving and frictionally engaging a plurality of tapered plugs 13. Each of these plugs is secured on a lever 14, and the levers 14 are pivotally mounted on the body 1 as indicated at 15, each pivot 15 extending through apertured cars 16 of the levers 14:. Each lever 14: is provided with a plug or shutter 17 positioned to enter and close the vents and apertures 11 as illustrated in Fig. 2. Springs 18 are provided for yieldingly holding the shutters 17 in the closing position relative to the vents or fluid outlets 11, but these springs may be relatively weak, or may be eliminated where the shutters 17 are adapted to be held'by friction, against the fluid pressure, in engagement with the walls of vents 11. In either event, the levers 14: can be held in the dotted line position (shown in Fig. 2) by the frictional engagement of their respective plugs 13 with the holes or keepers 12.

The operation of the device is as follows:

When air is forced through the tubular passage 6, from the pipe 7, while the connection 3 is in connection with a tire or other receptacle, a part of this air or fluid passes into the tire or other receptacle, and a part passes into the cylindrical cavity 2 and exerts a pressure on the piston 9. The tension of the spring increases in proportion to the amount of its compression, and therefore, it requires a considerably greater amount of pressure to force the piston past the second vent 11 than to force it past the first and more pressure is required to force provided with a numerical scale ranging from forty to onehundred-twenty pounds, as indicated at 19, or with any other appropriate scale, according to the various requirements of devices of this character. The vents 11 are normally held closed, as previously described, but when it is desired to apply eighty pounds, for instance, to the tire or receptacle being inflated, the lever let opposite the scale-number 80 has its outer end depressed with suiiicient force to cause the plug 13 to stick within and be held by the corresponding hole or keeper 1?, a finger-piece 14k being provided on each lever for pressing this outer end inward. By thus securing the outer end of this lever is in its depressed position, the inner end thereof is held away from the body 1, so that its shutter 17 does not now shut the corresponding vent 11. Therefore, when the piston 9 has moved outward beyond the vent at the scale-number 80, the passage 6 communicates with the outer air through the medium of the cavity 2 and the open vent 11, and compressed air now escapes through this open vent and causes a sound which indicates to the user that the desired pressure has been attained, and the pumping operation is discontinued, or the valve 8 turned to shut off the current of fluid.

It is not intended to limit this invention to the exact details of construction and arrangement as illustrated and described, but changes may be made within the scope of the inventlve ideas, as implied and claimed.

What I claim as my invention is:

1. In a fluid-pressure gage, a hollow body provided with fluid outlets, a pressed piston in aid hollow body and movable against the tension of said spring by the fluid pressure and thereby caused to pass said outlets successively as the fluid pressure increases, spring pressed shutters for closing the said outlets, and means to hold any elected one of the shutters against the pressure of its spring out of its shutting position relative to its correlated outlets.

2. In a fluid-pressure gage, a hollow body provided with a fluid inlet connectible with a source of fluid under pressure, a delivery outlet to communicate with a tire or other fluid receptacle, a set of fluid-escaping apertures, and a set of keepers, a spring-pressed piston in said hollow body and movable past said fluid-escaping apertures successively against the spring-pressure, shutters to close aid fluid escaping apertures, and levers pivotally mounted on said hollow body to coaet with said keepers for holding any elected one of said shutters out of its shutting position relative to its'correlated fluid-escaping aperture.

8. In a fluid-pressure gage, a hollow body provided with fluid outlets, a springpressed piston in said hollow body and 1novableagainst the tension of said spring by the fluid pressure and thereby caused to pass said outlets successively as the fluid pressure increases, shutters for closing the said outlets, levers carrying said shutters, and plugs on said levers, said hollow body being provided with holes into which said plugs can be tightly fitted respectively and which coact with said plugs and levers for holding any elected one of said shutters out of its shutting position relative to said outlets.

In testimony whereof I have hereunto set my hand.

VVILLIA'M BASIL ANDERSON.

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